Annual Test

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Citadel100
Case Study
“KKeeeeppiinngg BBuussiinneessss AAllwwaayyss OOnnlliinnee”

2. Citadel100 – Simulated Facility Power Outage
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Table of Contents
Facility Power Test.........................................................................................................................3
Timelines............................................................................................................................................4
Graphs..................................................................................................................................................5

3. Citadel100 – Simulated Facility Power Outage
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FACILITY POWER TEST
Noel,
For your information, we will test the complete power support system for
the facility tomorrow, July 18.
This will entail a simulation of a full utility outage.
We have been planning this operation since last August and have agreed a window for
tomorrow's date with all our customers.
Specialist contractors in attendance will be ESB, Mercury, F G Wilsons, Hitec, Schneider,
Anord and our own team.
The operation starts at 07:00 and power restoration is scheduled for 15:30.
We have full confidence in our resilient design and will notify you when complete.
The above mail was the final notification issued in a process that had been in the planning
stages for almost 12 months.
In any environment testing support equipment is important, in a Data Centre such testing is
critical.
The continual monitoring, measuring, calibration and maintenance of critical power paths in a
Data Centre are a constant, second by second occurrence.
The proving of this support path is only achieved in one way – total removal from the
National Grid.
Citadel100’s world class Data Centre in the National Digital Park, Citywest, Dublin carried
out such a test on July 18th
, 2007.
The actual test was preceded by months of preparation, client engagements and liasing with
all the third party personnel that were required in order to ensure total support for any
eventuality.
The operation itself began with a 07:00 briefing to all persons involved and the assignment of
specific tasks to individuals.
Following this, each person took up his or her post and awaited confirmation that the first
phase had begun.
Phase 1 involved shutting down T7 at 07:31.
T7 is the mechanical transformer feeding chillers, pumps, cooling units and controls.
The power down was effectively recognised by the Energy Management Systems as a power
outage triggering the support systems to take load by energising the Generation sets.

4. Citadel100 – Simulated Facility Power Outage
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The design of the plant allows cooling to be dropped during a power outage and to restart
when Diesel generation has synchronised and taken up full load.
Cooling was restored at 07:34.
The remainder of the transformers, which feed the critical power to the data suites, were
powered down in numerical sequence.
During this period there was, as designed, zero impact on any of our client’s critical
equipment.
In order to fully test the plant we remained on Generator support until 15:30 at which time
Utility supply was restored.
It was also important to study the impact of power restoration and to note the operation of the
control systems as utility power returned to normal.
The outcome was the complete proving of the entire Facility and confirmation that the design
and implementation was totally resilient.
The result was enhanced client confidence and most importantly keeping our business always
online.
From: Lyons, David
Sent: 18 July 2007 16:40
To: Carroll, Denis; Hennessy, Karl; Mc Donald, George
Cc: McCaul, Sinead; Irwin, Philip; Hurley, Brian; Meaney, Michael
Subject: MV change
Denis, Karl, George,
Just a quick email to thank you for all your efforts in ensuring that there was no impact to HP customers during
the MV settings change today, the transition from ESB to Generator power and back was as seamless as could
be possibly expected.
If you could also pass on our thanks to all facilities staff involved too.
Regards,
David Lyons
Service Business Support Manager
TIMELINES
July 18th
, 2007. 07:00 – Team Briefing.
July 18th
, 2007. 07:31 – T7 shut down.
July 18th
, 2007. 07:32 – Gensets energised.
July 18th
, 2007. 07:34 – Cooling restored.

5. Citadel100 – Simulated Facility Power Outage
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GRAPHS
The following graphs are snapshots from a single power supply showing
1. Loss of Utility Power.
2. Take – up by Generator supply.
3. Uninterrupted power supply to client equipment.
A) This graph shows the utility power feed from transformer 4A.

6. Citadel100 – Simulated Facility Power Outage
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B) This graph shows the power feed from the generators to breaker 4A following utility loss.

7. Citadel100 – Simulated Facility Power Outage
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C) This graph shows the power in the data suite – no break in power during the exercise.